From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 24082 invoked by alias); 15 Feb 2016 17:08:22 -0000 Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Workers List List-Post: List-Help: X-Seq: 37988 Received: (qmail 13051 invoked from network); 15 Feb 2016 17:08:21 -0000 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on f.primenet.com.au X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brasslantern-com.20150623.gappssmtp.com; s=20150623; h=from:message-id:date:in-reply-to:comments:references:in-reply-to :comments:to:subject:mime-version:content-type; bh=ED21NAmV1nPpaAAZyglF49OUvn+pmx0hKuuNKWeIJkk=; b=c8Hp44byAjmOLN34wwoquTCCU8oMqX0rn751Xgk3KBiuW6r5f6CNbutWOr9WiW11Ww aUFRpwPr5kpLMoryn2gSVW7rGY0vs0pPQo82qA6NT6q2gDaQzxrCO2wdIFqiHjzXJ9lD 0NHmW8k1+8tZ054sMiVfSd3oimTOmZTAOzPMncdcbvPLlT3rdKgDgKmJRGMpwQaLvaMq LurlvabszPaGjYKd2NmNmx+QESayo7UxrnlEiUSp9RamS8EOfeeEaoshr+kV0k6IFdjA tXGgl35kOL60fv9pX+vNSd3crOsyjuzH45fRtf78zJsPIRqNU+5mx6P29gFCWWlaT/yf 5Lbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:message-id:date:in-reply-to:comments :references:in-reply-to:comments:to:subject:mime-version :content-type; bh=ED21NAmV1nPpaAAZyglF49OUvn+pmx0hKuuNKWeIJkk=; b=l9Wr6ByQ7t0IgNF2Y0KU+2oqc+dJFx7eHqGclbSu4Ww9cOnXI2UjAsIk/Ux22UMrFP S0287+ognB2CxTI2af0m4nTXLiELwaxmfN6XLCfm60mF3492+w1AVyix9arqmvtYai13 5X1rXUyWUjdJvPwlh8j2qj7tJGHAX6zBxrC+sGzhN8EM0hFwDkMRG9/ux4UjzhVji8If zXy/RKRqT1WbPg2/MtZHVWKZxETbd9VYsJ6TTs0tfPuUrL/uJVm6IqMDYHAw0EdeRXJz seROXE+zCh8ecqgc1o5GomKitLL3HvPL5oNpDOiYB9Njjv21T4YEDBHFRwNhQzTrSZQI nDAA== X-Gm-Message-State: AG10YOQ3+moSOg07zQmFWPfpmo0oDyVeuqn1S0f8G0OFj2bUlmmXNWT5wjDSO98dwrRw5A== X-Received: by 10.66.255.9 with SMTP id am9mr24910233pad.86.1455556100094; Mon, 15 Feb 2016 09:08:20 -0800 (PST) From: Bart Schaefer Message-Id: <160215090839.ZM27409@torch.brasslantern.com> Date: Mon, 15 Feb 2016 09:08:39 -0800 In-Reply-To: Comments: In reply to Mikael Magnusson "Re: Assigning to $0 (formerly: PATCH: funcstack[-1])" (Feb 15, 7:51am) References: <20151230104531.GA20496@linux.vnet.ibm.com> <5683F898.7010907@inlv.org> <20160205100902.GA14979@linux.vnet.ibm.com> <20160205102735.1f09973a@pwslap01u.europe.root.pri> <20160205104444.2437ad33@pwslap01u.europe.root.pri> <20160205160236.1274aa5b@pwslap01u.europe.root.pri> <20160205222750.1fda3574@ntlworld.com> <160214135247.ZM3326@torch.brasslantern.com> <20160215091734.320ad457@pwslap01u.europe.root.pri> In-Reply-To: <20160215091734.320ad457@pwslap01u.europe.root.pri> Comments: In reply to Peter Stephenson "Re: Assigning to $0 (formerly: PATCH: funcstack[-1])" (Feb 15, 9:17am) X-Mailer: OpenZMail Classic (0.9.2 24April2005) To: Zsh hackers list Subject: Re: Assigning to $0 (formerly: PATCH: funcstack[-1]) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii On Feb 15, 7:51am, Mikael Magnusson wrote: } } > So typeset will accept 0 as a valid name and -g as a valid option, but } > can't actually set the global $0. } } http://www.zsh.org/mla/workers/2015/msg01400.html Some time before } that patch, assigning to $0 was always possible, but at some point it } stopped working. No, I think it was never possible to assign to the global $0 from inside a function. torch% print $ZSH_VERSION 4.2.0 torch% zero() { typeset -g 0=argzero; print $0 } torch% print $0; zero; print $0 /bin/zsh argzero /bin/zsh torch% This is because the "argzero" C global is handled independently of the usual parameter scope code. On Feb 15, 9:17am, Peter Stephenson wrote: } } > 1. POSIXARGZERO makes $0 report an error on assignment (read only?) } } This seems to make the most sense. Setting a value of $0 you're not } going to see immediately is pointless. diff --git a/Src/params.c b/Src/params.c index 0233e2b..8bd8a8e 100644 --- a/Src/params.c +++ b/Src/params.c @@ -4158,7 +4158,9 @@ static void argzerosetfn(UNUSED(Param pm), char *x) { if (x) { - if (!isset(POSIXARGZERO)) { + if (isset(POSIXARGZERO)) + zerr("read-only variable: 0"); + else { zsfree(argzero); argzero = ztrdup(x); }